1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86463ed84fbb4fb491631f116bbf73a9dad6fbe22eef0795f9ccbbdd10c2de89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17f6d1b9-ffb8-4bbf-803b-7bf6b3c18e8c.json and https://artists.proofprofile.net/proofs/artist/17f6d1b9-ffb8-4bbf-803b-7bf6b3c18e8c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9ed33635c3abd0aa72b73f771be6997f9a63c215f84943ad8a9d60a041f9da. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6K2203987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e83e0cce0bedfc0465365599ee6f99e8cc0c2893d44378715728405c1cf435. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEM2358363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23372dd60fca3a163b6695d432ff6336ebc5f9a835a80f2e8d2d4ef20094051. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2302000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bbb44a74ac5e794bb889669acda7b5c01e5998c178529a47aced2d97b35f35. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2302001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b85290526de7bb43b7272fa273c9c62a8fad8ff21f940db144dbd6e3e25c404. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2302002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983fe2fd20bf4cee8390161449ffa632481dd41e5acfaa76e0513c72bd4548aa. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2302004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4241fa06c5a547a11c95929a4668696ad75d67e05dbb90c24e4e56d1995324fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLR2306095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fd26a2a5776dad3db3e01272321ffb6ba901da7d9bb4dfcf5e98ab5bab8b17. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFL2305858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613947cd659315601abfaf24377fbeb868eec47630f1098b52e8740a8f6175ad. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYY2428980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea651f97c6d30549432b8dd18fd7c9248dd03c4f9ea9fb0d610ab905c85a0deb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32486080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a1c7d363365bfe954da376545e5dfb4f023b93039bc8958fc2c822c701cf60. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2467187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349467253d455104c21c503e8c7ffda29afd8d4ce45cd0f08f1a2440fe2170a2. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82461931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eac4a51d9f9c32e60f0594b7aa9f5215260da9bc23ed77123efd8dab86921cd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:15:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42573153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18acce013d1ddbfce064c85686828f749d87fe4603173175a90f88f58cdb77dd. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42575827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c5daf69d8c03463044b5bc45878bcd992b545a422306c8fa1ad3e3aac5f838. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42578475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c916d404df271541f845de563433b182b8b8fdac56296692a4406aa012ff223. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42573137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb70c094663c4752e03905da6464df18397d989b1808d7d644edfc2161135822. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32598601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d8279d4b889f051eca7c1385b7a45a16c3612d480f9881ad757ba5c8e1ca9. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32598604.